Not really sure what I want to focus on right now, to Relic builders, is T4 Alloy worth it?

Yeah, as stated, my account is kind of hitting this point of diminishing returns. I have 3 Rank 4 seven stars, I've 100 percented most things in the game and I just don't think I'll ever really get passed URU in battle grounds. I still enjoy the game and will probably play it till end of service but currently, nothing really is catching my interest. I don't currently have any Rank 3 relics (I did not 100% act 6, or 7, whichever that gem was in) but I noticed that a T4 Alloy is shockingly valued by the game, (at least in terms of BG currency), for those who have them, is that a grind worth grinding? Do Rank 3 Relics improve your character in meaningful ways?
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As in, I haven't noticed much difference between having these at rank 1 and rank 3...
On the other hand, I think Kabam said something in the last stream about future rewards being tied to people's prestige level, so it might be worth it for that.
Bgs do not take priority now, everything else is engaging.
Do not but t4 basic alloy with bg tokens. Way too damn expensive.
Right relics may save you few seconds, but it's mainly for prestige. R2 works fine, And kabam is milking r3s.